What is the disadvantage of consultative style of management?

Consultation means one or more people can offer opinions, so consultative style of management's drawback would be that the people offering opinions wouldn't always agree. The advantage, though, is that many ideas may bring creative change. However, many ideas could bring stalemate if no one can bring the ideas together or if no one can choose the best ones. I think this might have been called "leading by committee" (an old joke).